Sand-sifting apparatus.



H. 0. MAGNUSSON.

SAND SIFTING APPARATUS.

APPLICATION FILED APR. 2, 1914.

Patented Dec. 21, 1915.

A TTORNE YS.

WITNESSES COLUMBM PLANOGRAPH 120., WASHINGTON. n. c.

HENRY 0. irasivussoiv, or CHICAGO, rumors.

menses.

lsann srr'rrne arranarns.

Specification of Letters Patent.

Patented ea. air, iota.

Application filed-April 2, 1914.. Serial No. 828,995.

To all "whom it may concern Be it known that I, I'IENRY O. Maenusson, acitizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and usefulImprovement in Sand-gifting A r paratus, of which the following is aspecilication.

This invention relates to sand sifting upparatus and has for its objectto provide a new and improved device of this description, particularlyadapted for use in foundries.

The invention is illustrated in. the accompanying drawings, wherein:

Figure 1 is a side elevation of a device embodying the invention; Fig. 2is a plan view of the device shown in Fig. 1; Fig. 3 is a rear end viewof the device illustrated in Figs. 1 and 52. I I

Like numerals refer to like parts throughout the several figures.

As illustrated in the drawings the device consists of a frame 1 havingthe front legs 2 and rear, legs 3, the legs being arranged so as tostraddle the sand pile. The rear legs 3 are preferably provided withrollers so that the device can be easily moved from place to place. Thefront legs may also be provided with rollers, but I prefer not to haverollers on these legs so that the device will stand in a steadierposition. When it is desired to move it from place to place, the frontlegs may be lifted. Mounted on the frame 1 is an arm 4; having a pivotedor rocking connection with the frame and carrying the sieve or riddleholder 6. As herein shown, the arm has a sliding connection with theguiding device consisting of the guiding parts 5, said arm I having atthis point a rocking connection with the frame 1.

A suitable means is provided for giving the sieve or riddle 13 connectedwith the riddle holder 6 a rotary movement in a substantially horizontalplane so as to agitate the sand or other material in the riddle andcause the portions of the proper size to pass therethrough. As hereinshown, this result is secured by a suitable mechanism mounted on theframe 1. In the drawings this mech- The gear 7 is connected with the endof the arm :iso as to give it a rotary movement to rock it about therocking connection 5, thus giving the sieve or riddle a similar rotarymovement. Any suitable connection may be used. [is herein shown, thegear is pro vided with a crank 10, which connects with the end of thearm 1. The speed at which the riddle. or sieve is driven can beregulated to suit the conditions presented and may be varied by varyingthe speed of the motor or changing the ratio between the worm 9 and thegear 7.

In the construction shown, the worm 9 and the gear 7 are inclosed in acasing 11, the crank 10 connected with the gear 7 bridging through saidcasing and having its end connected with the arm 4. The riddle frame 6may be. constructed in any de sired manner and as here shown the twoparts thereof are connected together by a screw controlled by a handlel-l so that the parts may be tightened to hold the riddle 3 or torelease the same.

It will be seen that by means of this apparatus the sieve or riddle isgiven a rotary motion which causes the sand or other ma terial thereinto be moved with relation to the riddle so as to cause the finerparticles thereof to pass through the riddle. This apparatus produces alooser sand in less time, which is very important in making molds and ischeap and durable and easily transported from place to place.

I have described the apparatus in detail, but it is of course evidentthat the form, construction and arrangement of the parts may be variedwithout departing from the spirit of my invention.

It will be noted that in the construction hereinshown the riddle isentirely free from obstructions of any kind, either above or below saidriddle, thus permitting the free and unobstructed handling of the sand,both in placing it in the riddle and removing it from beneath theriddle.

It will further be noted that the movement of the riddle in this case issuch that the position of the central axis of the riddle is varied; andit will also be noted that the point on the arm a about which it rocks,is varied as the arm is slid back and forth through the guiding devices.

I claim:

1. A sifting device comprising a frame, an arm mounted upon said framein a substantially horizontal position and having a rocking and slidingconnection with the frame, a riddle connected with the arm on one sideof said rocking and sliding connection and a rotary driving deviceconnected with said arm on the opposite side of said rocking and slidingconnection.

2. A sifting device comprising a frame, an arm mounted thereon in asubstantially horizontal position, a guiding device with which said armis slidably and pivotally connected, a riddle connected wi 11 said armon one side of said guiding device and, a rotary driving deviceconnected with said arm on the opposite side of said guiding device.

A. sifting device comprising a riddle, an with which said riddle isconnected, a frame upon which said arm is carried, said arm having asliding pivotal connection and a rotary connection with said frame and arotary driving device connected with said arm whereby the riddle ismoved to change the position of its central axis.

4:. A sifting device comprising a frame. a motor mounted thereon, a gearmounted on said frame and driven by said motor, a crank connected withsaid gear, an arm connected with said crank and having a sliding androcking" connect-ion with said frame at a point intermediate the ends ofthe arm and a riddle connected with said arm.

5. A sifting device comprising a frame, an arm mounted upon said framein a sub- Ccpies of this patent may be obtained for stantiallyhorizontal position, said arm having a rocking and sliding connectionwith said frame, a riddle connected with said arm and a driving devicealso connected with said arm and adapted to simultaneously slide saidarm and rock it from side to side. i

6. A sifting device comprising a frame, an arm mounted upon said framein a substantially horizontal position and projecting therefrom, saidarm having a rocking and sliding connection with said frame, a drivingdevice connected with one end of said arm and a riddle connected withsaid arm, whereby the point on said arm about which it rocks is *aried.

7. A sifting device comprising a frame. an arm mounted on said frame ina substantially horizontal position. said arm having a rockingconnectionwith said frame, a riddle support connected with one end of said arm, acrank connected with the other end of said arm. a worm gear connectedwith said crank, a worm engaging said worm gear and means for driving);said worm.

In testimony whereof I afiix my signature in the presence of twowitnesses this 23th day of March, 1914.

HENRY O. )L'XGNUSSON.

Witnesses GENEVA Hinru, LAUREL M. Dommns.

five cents each, by addressing the Commissioner of Patents.

Washington, D. C.

